pulleys also affect torque - sllowing a motor down with a VFD does not
amplify torque, using a pulley to do so does amplify torque
proportionately. you need both.

On Thu, 16 Feb 2006 23:56:28 -0500, "Proctologically Violated©®"
wrote:

ergo the distinction between variable speed/stepped pulleys moot (at least
w/ 3 ph motors)?

One thing is for su VFD is lot more expensive than stepped pulleys!
But mebbe the way to go, if there are no other disadvantages.
Bill

www.wbnoble.com

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